today. And in so doing, we asked the cast of "the lion king" to create a special performance for us. To celebrate the life of nelson mandela. Before we see it, I want to speak with ron, one of the original and current members of the cast who join us. Ron, you're going to perform "one by one." A song that's poignant. But perhaps especially so today. Part of the lyrics translated read hold on tight, my people. Don't get weary. Don't lose your strength. We can see they will not succeed. Yes. What, today, will it mean to sing these words? To sing these words today, means a great deal because, you know, without nelson mandela, without his leadership, and also his ideology of a nonracial democratic south africa, we wouldn't be where we are today because this is the man that really prevented streams of blood in the streets. In this song, we celebrate our freedom. We've seen today, the long lines as so many lined up to vote for the first time. We see what the country is today. You are south african. There's been south african cast members all over the globe, as they perform "the lion king." What for you will mandela's legacy be? The legacy of nelson mandela for me would be, for us, in fact, it's going to be a test because we have to perpetuate his vibrant vision of nonracial democratic society. So, it's a challenge to the whole, to the rest of the world, as well. To make sure we fight against white domination and black domination because these are the ideals for which he was prepared to die for. And these are the ideals that he transmitted from one generation to another. A life we singularly celebrate today.

This transcript has been automatically generated and may not be 100% accurate.